Blame src/examples/minimal_example_comet.c

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/*
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     This file is part of libmicrohttpd
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     Copyright (C) 2007, 2008 Christian Grothoff (and other contributing authors)
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     This library is free software; you can redistribute it and/or
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     modify it under the terms of the GNU Lesser General Public
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     License as published by the Free Software Foundation; either
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     version 2.1 of the License, or (at your option) any later version.
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     This library is distributed in the hope that it will be useful,
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     but WITHOUT ANY WARRANTY; without even the implied warranty of
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     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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     Lesser General Public License for more details.
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     You should have received a copy of the GNU Lesser General Public
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     License along with this library; if not, write to the Free Software
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     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
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*/
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/**
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 * @file minimal_example.c
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 * @brief minimal example for how to generate an infinite stream with libmicrohttpd
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 * @author Christian Grothoff
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 */
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#include "platform.h"
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#include <microhttpd.h>
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static ssize_t
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data_generator (void *cls, uint64_t pos, char *buf, size_t max)
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{
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  (void)cls; /* Unused. Silent compiler warning. */
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  (void)pos; /* Unused. Silent compiler warning. */
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  if (max < 80)
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    return 0;
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  memset (buf, 'A', max - 1);
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  buf[79] = '\n';
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  return 80;
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}
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static int
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ahc_echo (void *cls,
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          struct MHD_Connection *connection,
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          const char *url,
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          const char *method,
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          const char *version,
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          const char *upload_data, size_t *upload_data_size, void **ptr)
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{
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  static int aptr;
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  struct MHD_Response *response;
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  int ret;
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  (void)cls;               /* Unused. Silent compiler warning. */
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  (void)url;               /* Unused. Silent compiler warning. */
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  (void)version;           /* Unused. Silent compiler warning. */
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  (void)upload_data;       /* Unused. Silent compiler warning. */
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  (void)upload_data_size;  /* Unused. Silent compiler warning. */
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  if (0 != strcmp (method, "GET"))
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    return MHD_NO;              /* unexpected method */
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  if (&aptr != *ptr)
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    {
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      /* do never respond on first call */
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      *ptr = &apt;;
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      return MHD_YES;
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    }
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  *ptr = NULL;                  /* reset when done */
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  response = MHD_create_response_from_callback (MHD_SIZE_UNKNOWN,
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                                                80,
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                                                &data_generator, NULL, NULL);
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  ret = MHD_queue_response (connection, MHD_HTTP_OK, response);
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  MHD_destroy_response (response);
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  return ret;
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}
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int
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main (int argc, char *const *argv)
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{
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  struct MHD_Daemon *d;
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  if (argc != 2)
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    {
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      printf ("%s PORT\n", argv[0]);
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      return 1;
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    }
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  d = MHD_start_daemon (MHD_USE_AUTO | MHD_USE_THREAD_PER_CONNECTION | MHD_USE_INTERNAL_POLLING_THREAD | MHD_USE_ERROR_LOG,
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                        atoi (argv[1]),
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                        NULL, NULL, &ahc_echo, NULL, MHD_OPTION_END);
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  if (d == NULL)
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    return 1;
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  (void) getc (stdin);
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  MHD_stop_daemon (d);
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  return 0;
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}